The BIN says the following:
"Rabbi Yonasan Eibshetz in his book Ya’aros Dvash states, 'At a certain moment the time will come when the Messiah should have already arrived but the redemption has not yet come. The Messiah will ask how it could be that the time for redemption has arrived and he still undergoes sufferings? The response that he will receive is that he must wait for nine months. Why? In order to wait for the fall of Persia (Iran) at the hands of Edom (the Christian West), and then the final redemption will come!"
Does anyone know where Rabbi Yonasan Eibshetz says this in Ya’aros Dvash?